Electrical condenser



1 June 30, 1931. A. JAYET 1,812,243

ELECTRICAL CONDENSER Filed Feb. 10, 1925 M a @ZQ...

Patented dune 30, i931 nits sr .ilLfilh il'AT-IET, F WERIDON, SWITZERLAND, ASSIGNOR TO LEGLANCHE 3. LL, or L FnRDUN, SWLTZERLAND ELECTRICAL CONDENSER .fipplicatien filed February 10, 1928 Serial No. 253,447, and in Germany February 12, 1927.

The present invention relates to electrical condensers.

it has been proposed to form the terminals of small condensers with lamellae made of Flexible thin metal plates imbedded in insulating substance and to guard the same a ainst mechanical stresses in such a manner, tnat in ordinary use the terminals cannot get loose and no air can get to the dielectric so that the capacity of the condenser cannot diminish. Hitherto it was diilicult to shut oif these insulating pieces air-tight with the usual sheet metal casing of the condenser, because these pieces could not be heated again after their finishing in order to get united with the sheet metal casing. The casting of the dielectric was very irregular since it happened that, while the terminals and the insulating pieces supported great stresses, the connection between the insulating piece and the sheet metal casing formed a weak part which gave way under such stresses.

Another method was by filling-up the cover while simultaneously catching the same under a flange of the casing. In this case the msulating material could never get dry enough so. as to afford a solid hold to the'sheet metal plates;

The object of the invention is a condenser of the kind described in which the body of insulating material wherein the lamellae used as terminals are imbedded is surrounded by a sheet-iron frame which is attached airtightly to the sheet metal casing by solderln the annexeddrawings a condenser is represented asan example and constructed accordin to the presentinvention.

Fig. 1 shows the apparatus in an unfinishedtains two armatures not represented and cast into an insulating substance l). The armatures project with lugs a serving connections between the armatures and the terminals (5 leading from the insulating substance. The terminals are formed lilte thin plates of sheet copper and corrugated about at the midst of their length. These terminals are imbedded, together with a sheet metal frame e into an insulating body f. This ingo sulating body is rigid and heat-resisting and forms in combination with the terminals and thesheet-metal frame a cover for the casing. On the bottom side of this cover the protruding ends of the terminals are bent over, thus 55 forming surfaces to which the lugs coming from the armature are soldered with a drop of solder, in the position as represented in Fig. 1. After this has been done the-cover is pressed down into the mouth of the casing 7 and the upper part of the body is surrounded with an apertured piece of sheet metal 9, whereupon the piece 9 to ether with the frame e are soldered to thee go of the casing. In this manner the armatures are enclosed air-tightly within the casing and under normal conditions no humidity can find access to the armatures.

What I claim as new is:

In an electrical condenser, an outer-casing, so a dielectric filling as means for insulating the armatures and reaching up near to the border of the casing, two slender lugs formin the connecting means of the armatures an extended over the surface of said filling, a cover for the casing, comprising a central insulating body, terminals imbedded therein with a corrugated portion and'having portions projecting from the bottom of the central body and soldered to said slender lu s and a sheet-metal frame embedded into said central bod and fittin inside the walls of the up er ree space 0 the casing and soldered t ereto so as to form an air and waterti ht joint. n testimony whereof I aifix my si ature.

ALOIS JA '1. 

